Datasheet

 2016 Microchip Technology Inc. DS00002202A-page 31
KSZ8081MNX/RNB
3.12 Reference Circuit for Power and Ground Connections
The KSZ8081MNX/RNB is a single 3.3V supply device with a built-in regulator to supply the 1.2V core. The power and
ground connections are shown in Figure 3-10 and Table 3-8 for 3.3V VDDIO.
FIGURE 3-10: KSZ8081MNX/RNB POWER AND GROUND CONNECTIONS
TABLE 3-8: KSZ8081MNX/RNB POWER PIN DESCRIPTIONS
Power Pin Pin Number Description
VDD_1.2 2 Decouple with 2.2 F and 0.1 F capacitors to ground.
VDDA_3.3 3
Connect to board’s 3.3V supply through a ferrite bead.
Decouple with 22 F and 0.1 F capacitors to ground.
VDDIO 17
Connect to board’s 3.3V supply for 3.3V VDDIO.
Decouple with 22 F and 0.1 F capacitors to ground.
VDDIO
KSZ8081MNX/RNB
GND
3.3V
VDDA_3.3
0.1μF
2
VDD_1.2
3
FERRITE
BEAD
17
1
PADDLE
2.2μF
0.1μF22μF
0.1μF22μF